Professional quality tape measure Exclusive PowerLock feature gives positive blade lock with no creeping Slide lock up front for easy operation Takes standard replacement blades or complete replacement cartridges Life Guard yellow blade protected with Mylar to reduce friction Easy to read and takes 3 to 10 times more abrasive wear than other blades Graduated in 16ths on both edges of one side Stud marking every 16 inches Belt clip is fastened on back of case